Contents
This sample demonstrates the use of the TIBCO StreamBase® Regular Expression Socket Reader in a StreamBase application that processes a text log file, storing the information extracted from the log in a query table. The log file is typical of a server log: it contains information about user logins, as well as other, spurious information. The format of the log file means it is not particularly suited to direct use in an application. It does not, for example, consist of CSV records that are ready to be turned into tuples; it must be parsed first and useful information extracted. Because the log file is text and line oriented, it is well suited to parsing using regular expressions.
This example is based on the Regular Expression File Reader sample. The file reader in that application has been replaced
by a socket reader, which is configured to connect to port 9000 on the local computer. The sample comes with a very simple
server written in Java. The source code and compiled JAR of this server can be found in the sample's directory. The server
simply listens on port 9000 and serves the contents of a file (by default, input.txt, though this can be specified on the command line) at one line per second to any connections.
Note
Before the sample application is started, the file server included in the sample directory must be running.
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A simple Java server is provided as part of this sample. Run it as follows:
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In the Package Explorer, open the Reference Libraries folder in this sample's project folder.
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Select
simpleserver.jar, right-click, and select → . This opens a Console view that shows a message like the following:Serving .\input.txt on port 9000 at one line per 1.0 seconds.
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In the Package Explorer, double-click to open the
RegexSocketReader.sbappapplication. Make sure the application is the currently active tab in the EventFlow Editor. -
Click the
Run button. This opens the SB Test/Debug perspective and starts the application.
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The Application Output view shows activity as the StreamBase application reads input from the Simple Server Java application.
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Select the Manual Input tab.
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Enter
joe,fred,bob, ormaxfor Username, and press . -
The Application Output pane shows the time and IP address for the last queried user, according to the log.
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When done, press F9 or click the
Stop Running Application button to stop the StreamBase application.
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In the Console view, use the Display Selected Console button to select the console showing
SimpleServer. -
Click the red square above the Console view to terminate the
SimpleServerprocess.
This section describes how to run the sample in UNIX terminal windows or Windows command prompt windows. On Windows, be sure to use the StreamBase Command Prompt from the Start menu as described in the Test/Debug Guide, not the default command prompt.
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Open several terminal windows on UNIX, or several StreamBase Command Prompts on Windows. In each window, navigate to the directory where the sample is installed, or to your workspace copy of the sample, as described above.
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Launch
simpleserver.jar. To do from a terminal, runjava -jar simpleserver.jar -
In another window, run
sbd RegexSocketReader.sbapp -
In another window, run
sbc dequeue Output. -
In another window, run
sbc enqueue Queries. -
In the enqueue window, type
joe,fred,bob, ormax, and press . The result of your query appears in the dequeue window. -
Run
sbadmin shutdown. -
In the window running
simpleserver.jar, press Ctrl+C to stop the server.
In StreamBase Studio, import this sample with the following steps:
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From the top menu, click → .
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Select this sample from the Embedded Adapters list.
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Click OK.
StreamBase Studio creates a single project containing the sample files.
When you load the sample into StreamBase Studio, Studio copies the sample project's files to your Studio workspace, which is normally part of your home directory, with full access rights.
Important
Load this sample in StreamBase Studio, and thereafter use the Studio workspace copy of the sample to run and test it, even when running from the command prompt.
Using the workspace copy of the sample avoids permission problems. The default workspace location for this sample is:
studio-workspace/sample_adapter_embedded_regexsocketreaderSee Default Installation Directories for the default location of studio-workspace on your system.
In the default TIBCO StreamBase installation, this sample's files are initially installed in:
streambase-install-dir/sample/adapter/embedded/regexsocketreaderSee Default Installation Directories for the default location of studio-workspace on your system.